Oil or gas fired revolving heating-furnace.



W. MELAS. OIL 0R GAS FIRED REVOLVING HEATING FURNACE. APPLICATION FILED AUG.12, 1913.

Imwmfor 1 UNITED STATES PATENT OFFICE.

WILLIAM. MELAS, 0F RIDLEY PARK, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF T0 DAVID TOWNSEND, OF PHILADELPHIA, PENNSYLVANIA.

OILOR GAS FIRED REVOLVING HEATING-FURNACE.

Specification of Iletters Patent. Patented Oct. 27 1914.

Application filed August 12, 1913. Serial No. 784,388.

To all whom it may concern Be it known that I, WILLIAM Mums, a citizen of the United States, residing at Ridley Park, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Oil or Gas Fired Revolving Heating-Furnaces, of which the following isa specification.

Those. branches of manufacture which use hot driven rivets for uniting plates,structural or other members require heating facilities for the rivets, whereby the same are not brought up to a uniform heat throughout their entire length, but whereby Only that portion of the rivet can be brought up to the desired heat which is to be formed into the head, while the remaining portion of the rivet should have a lesser temperature. This, however, cannot be accomplished in an ordinary heating furnace. Frequent trouble is also experienced with ordinary heating furnaces, where the rivets are thrown on the hearth and brought up to a welding heat, by their sticking together. On the other hand, if not brought up to such a high heat, so as to avoid sticking,- it

takes more power or time to form the head' in riveting. Another objection in ordinary rivet heating furnaces is the circumstance that the furnace operator has no control over the length of time during which each individual rivet is subjected to the heating operation with the consequence that a certain loss is usually experienced through rivets which are overheated or burnt in the oxidizing fiame which is usually carried in such furnaces. Still another drawback is the annoyance from heat and flame rediating from the charging opening and striking the operator while drawing the. heated rivets.

It is the purposeof my invention to over-Q come these objections and to embody certain novel and useful improvements my construction as will be described hereinafter, reference being had to, the accompanying drawing, in which- Figure I denotes avertical sectionthrough the axis of the furnace. Fig. II denotes a top view on the furnace. Fig.,III denotes an enlarged sectionthrough the upper part of the tank and the lower part of the furnace. Fig. IV denotes an enlarged section through the pipe connections to tank. Fig.

Vdenotes a partial side view of air sup- P y p pe- In Fig. 1, 5 IS a cylindrical, air tight tank, containing the liquid or gaseous fuel for the furnace and having an opening near the top which is in connection with a cook or other filling device 6. Into another opening near the top is screwed the pipe connection 7 whichhas several wings 8 at the screwed. end, these wings forming an abutment against the elbow 10 of the liquid fuel pipe 9 which ends near the bottom of said tank 5. The nozzle 9 is screwed into said elbow 10 and into nozzle 9 is screwed the T 11 until it is seated air tight against the face ofpipe-connection 7. The T 11 is at one end in connection with a drip cock 13 and at the opposite end with pipe 12, which, in turn, is connected to the fuel con nection of burner 21 by means of suitable piping 19, containing a union 17 and a shut-ofi' valve15. The pipe connection 7 is tapped to' receive compressed air pipe 14: which is connected to the air connection of burner-'21 by suitable piping 20, containing a union 18, a T 50 and a shut-ofi valve 16.

It will be seen that by means of the piping aforementioned, the burner 21 is detachably, but rigidly connected to the tank, in such a manner, that the axis of the burner coincides with the axis of the tank.

()n the discharge end of burner 21 is fastened circular flange 22 having a surface to.

correspond with-surface of top opening of spider 23 which is in axial alinement with tank and which is preferably made in two halves. Spider 23c0nsists of a hollow central portion with'a central opening on top whichis surrounded by other openings 26,

contracted throat 31. The furnace lining and spider lining are both in axial alinement with the tank. The furnace lining carries on the slanting side of the top a plate 32in, shapeof a hollow frustrated cone and the spider lining carries on the slanting side next to the spider 23 a similar but smaller plate 33. The open space between the smallest diameters of said conical plates has the shape of an annular ring and its width is somewhat larger than the diameter of the rivets 34 which are hung in the furnace suspended on their heads on said conical plates 32 and 33. In this manner a welding together of the rivets is avoided as it is impossible for them to touch on their shanks or bodies, the only place where they can touch being two points on the circumference of the heads, which heads, however, being outside, are not subjected to the high temperature inside of the furnace and, con-- sequently, cannot stick together.

To the lower end of furnace casing 27 are fastened angular brackets 37 by bolts or rivets 47 and the furnace rests with these brackets on the circular tray 36 and is fastened thereto by rivets or bolts 48 in such a manner that the furnace and tray are in axial alinement with tank 5. On the brackets 37 lies plate 49 which carries the furnace lining-28, thus leaving an air space be tween 49 and 36. The bolts or rivets 48 serve also to fasten an annular ring 45 to tray 36. The largest diameter .of said ring is somewhat smaller than the inside diameter of tank 5. Annular ring 45 is surrounded by an outside ring 38, the smallest diameter of which being somewhat larger than the outside diameter of tank 5, both rings being in axial alinement with tank 5. Outside ring 38 has several bored bosses 39, through which run bolts 40, to fasten ring 38 to tray 36. Ring 38 has at its lower inside surface a recess 46, being somewhat larger in width and depth than the diameter and height of heads 43 of screws 42 which are screwed into shell of tank 5 at its upper end. The upper face of tank shell 5 is finished to serve as ball race for balls 44 on which rests the tray 36, carrying the fur-,.

nace. Ring 38 has abore 41 in axial alinement with bolts 42 which serves the purpose of introducing a screw driver to remove bolts 42 is necessary. 1

Having thus described the elements of which that form of my invention is composed, which is shown on the accompanying drawing, I proceed to describe the operation of the furnace. v

For the purpose of filling tank 5 with liquid fuel valve 16 is shut, cock 6 and drip cock 13 are opened and fuel is introduced into the tank by suitable means through cock 6. The air is vented through spaces between rings 8 of pipe connection 7 into pipe 14 finally into the burner 21 where it escapes. The fuel level rises in both, the tank, and in pipe 9, which pipe is vented through open drip cock 13. As soon as oil commences to flow from drip cock 13 that tank is filled and cocks 6 and 13 are shut. Valve 16 is connected to some source of compressed air supply; and if valve 16 is opened a part of the air rushes through .pipe 14 into the tank, putting the oil under pressure, while a part goes into the burner. If valve 15 is opened the oil will be pressed through pipe 9, valve 15 and pipe 19 into the burner. The spray produced by the burner is ignited by suitable means, such as burning waste, and the fiame strikes the baifle-cone 35, is split up and fills the whole interior with an even heat, finally escaping through the spaces between the rivet heads. The spray, when emitting from the burner sucks the air necessary for complete combustion through the openings 26 in spider 23 and an intimate mixture of air and atomized oil is accomplished in throat 31 of spider lining 29. In passing the throat, the mixture will begin to ignite and combustion is completed in the furnace chamber. The fiaine or heat being evenly distributed, it necessarily follows that the same heating results are produced on all rivets introduced into the annular space between the linings. That portion of the rivet shanks which is in the furnace chamber below the annular-space between the" linings will acquire a higher temperature than the portion next to the head; and the heads, being entirely outside of the furnace, will get the least heat. The operator of the furnace is not annoyed by the heat or glare of the furnace interior while charging or removing the rivets. The welding together of the shanks or heads is entirely avoided. The circular tray is provided to receive a supply of cold rivets at a convenient distance from the charging place so as to enable the operator to charge quickly. The revolving feature of the furnace enables the operator to work always from the same place, thus saving time by reducing his working movements to a minimum.

The furnace can be detached from the tank.

Having thus described the purpose, usefulness and novel features of my invention, Iclaim:

1. In a rivet heating furnace for the use of liquid or gaseous fuel the combination of a cylindrical furnace casing, open at the up per-end and closed at the lower end by a circular pan; in said casing a refractory furnace lining with a bowl-shaped cavity, open at the top and with a conical upper surface slanting toward the axis; a baflie cone on the bottom of said lining; a hollow spider supported on the furnace casing by a number of arms extending from the spider body; a refractory spider lining with a flaring central hole and a protruding conical rim on the lower part, slanting from the axis; said lining forming an endless circular slot of equal width; a burner in axial ali'nement.

with said slot, having the discharge end in the central hole on top of the spider body.

2. In a rivet heating furnace for the use of liquid or gaseous fuel the combination of a furnace casing, open at the upper end and having a double bottom; a'refractory lin-. ing in said casing, having a slanting upper surface; a hollow spider in axial alinement with and supported by said casing; a refractory spider lining having a central hole and a protruding rim slanting toward the furnace lining; said linings forming an uninterrupted slot of equal width; said combination being rotatably and detachably connected to a base; a stationary burner in axial alinement with the axis of rotation of the combination aforementioned, said burner having the discharge end in the central hole on top of the spider body.

3. In a rivet heating furnace for the use of liquid or gaseous fuel the combination of a furnace casing, open at the upper end and having a pan-shaped bottom at the lower end; a refractory furnace lining contained within said casing and in axial alinement therewith, said furnace lining being open at the upper end; a refractory furnace roof spaced in axial alinement with and suspended by suitable means within, the .top opening of furnace lining, thus forming an endless slot of equal width between the smallest inner circumference of furnace lining and the largest outer circumference of furnace roof, sald furnace roof having an axlally located opening for the introduction of a flame from a burner; the combination aforementioned being rotatably and detachably connected to a base, a stationary burner in axial alinement with and above opening in furnace roof, said burner being rigidly, but detachably connected to the base.

In testimony whereof I have 'afiixed my signature in presence of two witnesses.

WILLIAM MELAS. Witnesses:

HARRY P. GREEvEs, MARGARET GREENLEE. 

